Shore patrol is an old concept in the Navy that San Diego officials have revived. Before this, shore patrol units usually only operated when a ship is in a foreign port — to ensure sailors don’t get in trouble away from home.

The black SP arm band that Bartee wears is a relic of older days. He thinks someone found it in a drawer.

These tactics — old and new — are also being introduced at Navy bases in Pensacola, Fla., Naples, Italy, and Yokosuka, Japan.

At San Diego’s three largest Navy bases, in San Diego at 32nd Street, Coronado and Point Loma, senior sailors such as Curtis and Bartee will walk the barracks into the wee hours — until 5 a.m. on weekends.

If they help one straggler veering toward trouble, officials say, it’ll be worth it.